Meaning of the word

[Vishal Uttekar]

Hello Friends,
Myself Vishal and basically working in metal working industry. Thats why I have to
frequently come across many technical terms. I recently heard a term-"Proof Machining".
I searched the meaning of the term in many technical & Engineering Dictionaries but could not
get a satisfactory & straight-forward answer.
Can anybody explain the meaning of the word "Proof" in the term "Proof Machining".

[SoothingDave]

It seems to mean the metal part is machined to near its final shape, so all you need to do is use your machine to do the final, precision machining.

[Vishal Uttekar]

Thanks for your reply and I am satisfied with this answer. Have a nice day.